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Electromagnetic Induction — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsElectromagnetic Induction1 Mark
Question
To induce an e.m.f. in a coil, the linking magnetic flux(a) Must decrease(b) Can either increase or decrease(c) Must remain constant(d) Must increase
   
   
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Answer

(b) Can either increase or decrease

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